National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

73°F

23°C

Humidity 74%
Wind Speed SW 16 mph
Barometer 29.86 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 10 Mar 10:50 am CDT
Extended Forecast for

Dorchester IL

  • Today

    Today: Mostly sunny, with a high near 80. Breezy, with a south wind 14 to 20 mph, with gusts as high as 29 mph.

    High: 80 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Low around 51. South wind 14 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 90%.

    Low: 51 °F

    Chance
    T-storms then
    T-storms

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm before 3pm, then a slight chance of rain between 3pm and 4pm. Temperature falling to around 47 by 5pm. Breezy, with a southwest wind 16 to 23 mph becoming northwest in the morning. Winds could gust as high as 30 mph. Chance of precipitation is 100%.

    High: 65 °F⇓

    Breezy. Rain
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming clear, with a low around 30. Blustery, with a northwest wind 16 to 21 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 29 mph.

    Low: 30 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Clear

  • Thursday

    Thursday: Sunny, with a high near 52. Light and variable wind becoming southwest 6 to 11 mph in the morning.

    High: 52 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 43. Breezy.

    Low: 43 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Friday

    Friday: Mostly cloudy, with a high near 60.

    High: 60 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 80. Breezy, with a south wind 14 to 20 mph, with gusts as high as 29 mph.
Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Low around 51. South wind 14 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 90%.
Wednesday
Rain and possibly a thunderstorm before 3pm, then a slight chance of rain between 3pm and 4pm. Temperature falling to around 47 by 5pm. Breezy, with a southwest wind 16 to 23 mph becoming northwest in the morning. Winds could gust as high as 30 mph. Chance of precipitation is 100%.
Wednesday Night
Mostly cloudy, then gradually becoming clear, with a low around 30. Blustery, with a northwest wind 16 to 21 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 29 mph.
Thursday
Sunny, with a high near 52. Light and variable wind becoming southwest 6 to 11 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 43. Breezy.
Friday
Mostly cloudy, with a high near 60.
Friday Night
Mostly cloudy, with a low around 37.
Saturday
Partly sunny, with a high near 65.
Saturday Night
A 20 percent chance of rain after 1am. Partly cloudy, with a low around 47.
Sunday
Rain likely. Mostly cloudy, with a high near 58. Breezy. Chance of precipitation is 70%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 20. Blustery. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 34.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Dorchester IL
 39.1°N 89.87°W (Elev. 659 ft)
Last Update:
10:51 am CDT Mar 10, 2026
Forecast Valid:
11am CDT Mar 10, 2026-6pm CDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation